Gallery, Projects and General > Project Logs
Oh Blimey I bought a CNC Lathe !!!!
MrSleepy:
--- Quote from: awemawson on April 25, 2013, 04:04:48 PM ---I took delivery today of a kit containing a magic low melting point high fluidity solder.
--- End quote ---
They do have traces of lead in them though..which can be a problem.
awemawson:
Just received an email from Traubs agents in the UK quoting me for a replacement MC465a which is the card I 'think' I fixed today.
£2461.50 plus VAT @20% plus carriage No I don't think I'll be buying one of those - anyway hopefully I don't need one now.
awemawson:
--- Quote from: MrSleepy on April 25, 2013, 04:14:24 PM ---
--- Quote from: awemawson on April 25, 2013, 04:04:48 PM ---I took delivery today of a kit containing a magic low melting point high fluidity solder.
--- End quote ---
They do have traces of lead in them though..which can be a problem.
--- End quote ---
I've been soldering components with 60/40 tin/lead solder for the past 45 years and I expect that this series of boards being made in the early 1990's was still tin lead so I don't suppose it'll be much of a technical problem, and certainly no worry to me whatsoever.
It's interesting to note that high reliability critical kit is still being made using tin/lead solder due to the fatigue effect of lead free which over time produces dry joints.
MrSleepy:
--- Quote from: awemawson on April 25, 2013, 04:20:41 PM ---£2461.50 plus VAT @20% plus carriage No I don't think I'll be buying one of those - anyway hopefully I don't need one now.
--- End quote ---
Wow thats ... well it reminds me of parts prices for my German Scheaff HR16 minidigger.
vtsteam:
I favor the cutting pins method on standard DIP packages so I don't over heat or over pry the package being removed, rather than trying to solder suck with the piece in place. In the old days we used to slip a nail file under -- similar to the wire method.
Overheating a plated through hole in a multilayer board can be big problem. Individual leads are much easier to desolder in one go than an attached package worth of leads, which often require re-heats of sticky legs. It's the re-heats with pressure that detach pads or mess up a plated through connection.
I use fingernail clippers to snip leads instead of a Dremel. No tendency to ricochet with a hand tool as there is with a power tool.
awemawson, are you replacing the DIP pkgs with sockets or are you soldering the new chips in place? I'd probably go with sockets to make sure your new chips don't include a dud. You can then substitute around to check.
Caps tend to have limited lives more than most other components in an old board. I don't see too many on your board, though.
I'm sure I'm just repeating things you already know, but throwing stuff out there just in case some little bit is helpful.
I got my fingers crossed for you. :thumbup:
Sorry to hear about the water situation, I know how that is. Makes everything difficult. :(
Soldier on! :thumbup:
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